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Saitama, Japan

Patent
Nipro Patch Co. | Date: 2012-08-24

The purpose of the present invention is to provide a hydrous adhesive skin patch which contains lidocaine and can be applied in a uniform thickness easily. This hydrous adhesive skin patch comprises a support and an adhesive agent layer arranged on the support, wherein lidocaine or a pharmacologically acceptable salt thereof, a hydrophilic adhesive agent, and diethylene glycol or a diethylene glycol monoalkyl ether are contained in the adhesive agent layer. The diethylene glycol monoalkyl ether is preferably at least one compound selected from the group consisting of diethylene glycol monomethyl ether, diethylene glycol monoethyl ether and diethylene glycol monobutyl ether.


Patent
Nipro Patch Co. | Date: 2010-09-01

Disclosed is a transdermally absorbable preparation, in which an adhesive agent produced by crosslinking at least one copolymer is contained in an adhesive layer and the aging period in the production of the adhesive layer can be shortened. The transdermally absorbable preparation comprises a support and an adhesive layer arranged on the support and containing an adhesive agent and a medicinal component. The transdermally absorbable preparation is characterized in that the adhesive agent comprises a resin mixture comprising 100 parts by mass of a specific acrylic copolymer (A) and 0.1 to 30 parts by mass of a specific acrylic copolymer (B) or 0.05 to 2 part(s) by mass of a polyamine compound, and the adhesive layer additionally contains an organic acid.


Patent
Nipro Patch Co. | Date: 2013-12-26

The objective of the present invention is to provide a method of preventing an oxygen-caused alteration of a drug in an adhesive patch enclosed inside a packaging container. The present invention is a package body comprising a packaging container and a drug-containing adhesive patch enclosed inside the packaging container, wherein the amount of oxygen gas inside the package body is 20 L or less, and the concentration of oxygen gas is 17.0 to 25.0 vol %. This packaging does not have to contain an oxygen scavenger as a separate member distinct from the drug-containing adhesive patch. Further, the amount of oxygen gas may be 4 L/mg or less per amount of a drug in the drug-containing adhesive patch.


The present invention is directed to a nonaqueous pressure-sensitive adhesive that may be used in medicinal tape preparations for percutaneous absorption. The adhesive may comprise a copolymer obtained by copolymerization of a (meth)acrylic monomer having an acetoacetyl group in the molecule and one or more monomers from among other (meth)acrylic monomers without acetoacetyl groups and copolymerizable vinyl monomers, in a nonaqueous solvent. Suitable (meth)acrylic monomers having an acetoacetyl group in the molecule are acetoacetoxyalkyl methacrylates, and especially 2-acetoacetoxyethyl methacrylate. The pressure-sensitive adhesive of the invention uses no polyamine derivatives, isocyanate compounds, polyvalent metal chelate compounds, etc., as crosslinking agents, and therefore toxicity is not a concern and skin is not irritated. A medicinal tape preparation for percutaneous absorption of the invention has superior adhesive strength and cohesive strength, and is highly safe with low skin irritation. It also has excellent drug release and percutaneous absorption properties.


Liu S.,Nipro Patch Co. | Yamauchi H.,Nipro Patch Co.
Oncology Reports | Year: 2010

Androgen and androgen receptor (AR)-mediated signaling are crucial for the development of prostate cancer. The present study indicates that the topoisomerase II inhibitor etoposide strikingly inhibits androgen/AR-mediated cell growth and androgen-stimulated DNA synthesis in prostate cancer cells. Etoposide significantly repressed the AR mRNA and protein expression in a dose-dependent manner. Etoposidemediated down-regulation of AR was associated with blocking androgen-induced AR translocation from cytoplasm into nucleus of cells. Additionally, etoposide disrupted the association of AR and heat shock protein 90 and impeded binding of the synthetic androgen [3H]R1881 to AR in LNCaP cells. Etoposide simultaneously reduced the intracellular and secreted PSA levels, a marker for the progression of prostate cancer. These findings collectively reveal that etoposide not only serves as a traditional genotoxic agent but directly targets AR as an AR disrupting therapeutic strategy in prostate cancer. Source

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